The only discount filter that fits the 22 X 22 X 1" size is this fiberglass panel filter. This discount filter has a replacement schedule of one month, so this 12-pack of filters will give you a year's worth of air filtration. It is recommended that the replacement schedule be strictly followed to maintain quality breathing air in every room. Once the fiberglass discount filter becomes clogged with debris, it will not allow air to flow through, which will not allow the filter to work properly.

This fiberglass filter has a Minimum Efficiency Reporting Value (MERV) rating of 4, which means it will serve as a basic filter and catch air particles larger than 10 micrometers. This mostly includes dust, lint and carpet fibers. The efficiency of this filter makes it perfect to use as a pre-filter for a more efficient filter. This will improve the life of the much more expensive filter, which will save you money by not having to replace them as often.